CN109294385A - Powdery paints and combinations thereof and method for coating product - Google Patents

Powdery paints and combinations thereof and method for coating product Download PDF

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Publication number
CN109294385A
CN109294385A CN201810811554.8A CN201810811554A CN109294385A CN 109294385 A CN109294385 A CN 109294385A CN 201810811554 A CN201810811554 A CN 201810811554A CN 109294385 A CN109294385 A CN 109294385A
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China
Prior art keywords
epoxy resin
equivalent
weight
composition
adhesive
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CN201810811554.8A
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Chinese (zh)
Inventor
塔蒂亚娜·叶利谢耶娃
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Coating Foreign Intellectual Property Co Ltd
Coatings Foreign IP Co LLC
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Coating Foreign Intellectual Property Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
    • B05D1/24—Applying particulate materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C09D163/10—Epoxy resins modified by unsaturated compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C09D5/033—Powdery paints characterised by the additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C09D5/033—Powdery paints characterised by the additives
    • C09D5/035—Coloring agents, e.g. pigments
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C09D5/033—Powdery paints characterised by the additives
    • C09D5/037—Rheology improving agents, e.g. flow control agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
    • B05D2401/30—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant
    • B05D2401/32—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Paints Or Removers (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

Provide powdery paints and combinations thereof and the method for coating product.It in an example, include adhesive for the composition of powdery paints, described adhesive includes adhesive resin part and adhesive curing part.Adhesive resin part includes that epoxide equivalent weight is first epoxy resin of the about 500g/ equivalent to about 560g/ equivalent.The epoxide equivalent weight of second epoxy resin is about 1600g/ equivalent to about 1950g/ equivalent.The epoxide equivalent weight of third epoxy resin is about 850g/ equivalent to about 1050g/ equivalent.

Description

Powdery paints and combinations thereof and method for coating product
Cross reference to related applications
This application involves and all of U.S. Provisional Patent Application 62/536,089 for requiring on July 24th, 2017 to submit can With equity, entire contents are incorporated herein by reference.
Technical field
Technical field is generally related to powdery paints, and relate more specifically to powdery paints and combinations thereof, Yi Jiyong In the method for coating product.
Background technique
Powdery paints in upper formed such as electric wire for example for insulating.Although these powdery paints can have desired spy Property, but there is still a need for relatively high flexible, good mechanical property and physical characteristic, heat-resisting ability and/or good economy The improved coating of property.
Accordingly, it is desired to provide being used for coating, the composition of powdery paints and the method for coating product, one kind is solved Or more aforementioned desired improvement.In addition, in conjunction with the background technique, from subsequent detailed description and the appended claims, Other desired characters and characteristic of present disclosure will become obvious.
Summary of the invention
There is provided herein for the composition of powdery paints, powdery paints and method for coating product.According to one Exemplary implementation scheme, the composition for powdery paints include viscous with adhesive resin part and adhesive curing part Mixture.Described adhesive resin portion includes that epoxide equivalent weight is first ring of the about 500g/ equivalent to about 560g/ equivalent Oxygen resin.The epoxide equivalent weight of second epoxy resin is about 1600g/ equivalent to about 1950g/ equivalent.Third asphalt mixtures modified by epoxy resin The epoxide equivalent weight of rouge is about 850g/ equivalent to about 1050g/ equivalent.
According to another exemplary implementation scheme, powdery paints is provided.The powdery paints passes through composition is dry-mixed And it is made.The composition includes adhesive, and described adhesive includes adhesive resin part and adhesive curing part.It is described Adhesive resin part includes that epoxide equivalent weight is first epoxy resin of the about 500g/ equivalent to about 560g/ equivalent.The The epoxide equivalent weight of diepoxy resin is about 1600g/ equivalent to about 1950g/ equivalent.The epoxidation of third epoxy resin Object equivalent weight is about 850g/ equivalent to about 1050g/ equivalent.The composition is squeezed out, it is cooling to form solid and be ground into Powder.
According to another exemplary implementation scheme, the method for coating product is provided.The method includes by powder Coating is applied to product to form the product through powder coating.The powdery paints is made and composition is dry-mixed.It is described Composition includes adhesive, and described adhesive includes adhesive resin part and adhesive curing part.Described adhesive resin Part is first epoxy resin of the about 500g/ equivalent to about 560g/ equivalent comprising epoxide equivalent weight.Second epoxy resin Epoxide equivalent weight be about 1600g/ equivalent to about 1950g/ equivalent.The epoxide equivalent weight of third epoxy resin It is about 850g/ equivalent to about 1050g/ equivalent.The composition is squeezed out, it is cooling to form solid and grind into powder.By institute It states the product through powder coating and is exposed to heat.
Specific embodiment
It is described in detail below substantially exemplary only, and be not intended to be limited to various embodiments or its application and use On the way.Furthermore, it is not intended to by aforementioned background art or any theoretical constraint of middle proposition described in detail below.
The various embodiments imagined herein are related to the composition for powdery paints, powdery paints and for coating product Method.It in an exemplary embodiment, include adhesive for the composition of powdery paints, described adhesive includes viscous Mixture resin portion and adhesive curing part.Described adhesive resin portion includes the first epoxy resin, the second epoxy resin With third epoxy resin.The epoxide equivalent weight of first epoxy resin is about 400g/ equivalent to about 560g/ equivalent.Second The epoxide equivalent weight of epoxy resin is about 1600g/ equivalent to about 1950g/ equivalent.The epoxides of third epoxy resin Equivalent weight is about 850g/ equivalent to about 1050g/ equivalent.
In the first exemplary implementation scheme of adhesive resin part, the first epoxy resin (referred to herein as " first Epoxy resin 1a " and as shown in table 1A and table 1B) be relatively low molecular weight and opposite high glass transition (Tg) modified ring Oxygen resin, epoxide equivalent weight are about 400g/ equivalent to about 450g/ equivalent, and epoxides percentage (%) is about 9.6 To about 10.8, epoxide group content is about 2220mmol/kg to about 2500mmol/kg, and softening point is about 105 DEG C to about 114 DEG C, fusing point is about 150 DEG C, and the viscosity at 150 DEG C is about 7500mPas to about 9500mPas.As used herein, soft Change point and/or various known technologies can be used to determine in fusing point, such as this is characterized by using differential scanning calorimetry (DSC) Various epoxy resin described in text, including determination glass transition temperature or softening temperature T (g) and such as 20 DEG C/min of use The rate of heat addition determine fusing point.First epoxy resin 1a is commercially available, such as by Dow Chemical Company manufacture Trade name D.E.R.TM 6510HT Epoxy Resin。
Second epoxy resin (referred to herein as " the second epoxy resin 2 " and as shown in table 1A and table 1B) is relatively soft The epoxy resin of property and relatively high molecular weight, is the reaction product of epichlorohydrin and bisphenol-A, epoxide equivalent weight is about 1600g/ equivalent is to about 1950g/ equivalent, and epoxides % is about 2.2 to about 2.7, and epoxide group content is about 510mmol/kg is to about 625mmol/kg, and softening point is about 126 DEG C to about 137 DEG C, and the viscosity at 25 DEG C as solution is about 2000cSt to about 2900cSt.Second epoxy resin 2 is commercially available, such as the quotient manufactured by Dow Chemical Company Name of an article D.E.R.TM 667E Epoxy Resin。
Third epoxy resin (referred to herein as " third epoxy resin 3 " and as shown in table 1A and table 1B) is through carboxyl The modified epoxy resin of butadiene-nitrile (CTBN) of sealing end, is butadiene-nitrile rubber of bisphenol A epoxide resin and carboxy blocking The adduct of glue, epoxide equivalent weight are about 850g/ equivalent to about 1050g/ equivalent, and softening point is about 65 DEG C to about 85 DEG C, fusing point is about 150 DEG C, and the viscosity at 150 DEG C is about 50 pools to about 200 pools.Third epoxy resin 3 is commercially available, example The trade name HyPox such as manufactured by CVS Thermoset SpecialtiesTM RK820CTBN Elastomer Modified Epoxy Resin。
In an exemplary embodiment, the first epoxy resin 1a, the second epoxy resin 2 and third epoxy resin 3 one Play the adhesive resin part of formation 100%.In an example, the total weight based on adhesive resin part, adhesive tree First epoxy resin 1a, about 45 weight %s of the rouge part comprising about 40 weight % to about 50 weight % (for example, about 45 weight %) are extremely The second epoxy resin 2 and about 1 weight % of about 55 weight % (for example, about 50 weight %) is to about 10 weight % (for example, about 5 weights Measure %) third epoxy resin 3.In another example, the first epoxy resin 1a, the second epoxy resin 2 and third asphalt mixtures modified by epoxy resin The ratio of rouge 3 is about 0.9:1:0.1 to about 1:1:0.3, for example, about 1:1:0.2.It in this embodiment and such as below will be into one What step was discussed in detail, adhesive resin part is combined with adhesive curing part and other optional additives can form part Coating (such as powdery paints), the coating have high temperature resistant (example particularly suitable for the insulation application to conducting wire (such as magnet-wire) Such as the thermal shock of at least about 220 DEG C (for example, about 220 DEG C)) ability, have relatively high flexible and good mechanical property and High electric insulation characteristic.
In the second exemplary implementation scheme of adhesive resin part, the first epoxy resin (referred to herein as " first Epoxy resin 1b " and as shown in table 1A and table 1B) be the intermediate molecular weight epoxy resin modified through novolaks, epoxidation Object equivalent weight is about 500g/ equivalent to about 560g/ equivalent, and epoxides percentage (%) is about 7.7 to about 8.6, epoxidation Object group content is about 1790mmol/kg to about 2000mmol/kg, and softening point is about 90 DEG C to about 98 DEG C, the conduct at 25 DEG C The viscosity of solution is about 370cSt to about 500cSt.First epoxy resin 1b is commercially available, such as by Dow Chemical The trade name D.E.R. of Company manufactureTM642U Epoxy Resin and/or the trade name manufactured by Nanya Epoxy NPESTM 660U Epoxy Resin。
In second exemplary implementation scheme, the second epoxy resin and third epoxy resin with about the first exemplary reality It is identical to apply disclosed in the aforementioned paragraphs of scheme those, and is correspondingly respectively designated as the second epoxy resin 2 and third epoxy Resin 3.In an exemplary embodiment, the first epoxy resin 1b, the second epoxy resin 2 and third epoxy resin 3 is together Form the composition of 100% adhesive resin part.In an example, the total weight based on adhesive resin part, bonding Agent resin portion includes the first epoxy resin 1b, about 65 weights of about 20 weight % to about 30 weight % (for example, about 25 weight %) Measure second epoxy resin 2 and about 1 weight % to about 9 weight % (for example, about 5 of % to about 75 weight % (for example, about 70 weight %) Weight %) third epoxy resin 3.In another example, the first epoxy resin 1b, the second epoxy resin 2 and third epoxy The ratio of resin 3 is about 1:2:0.1 to about 1:3:0.3, for example, about 1:2:0.3 to about 1:2.5:0.2.In this embodiment and As discussed in detail further below, adhesive resin part is combined with adhesive curing part and other optional additives Can be formed part coatings (such as powdery paints), the coating particularly suitable for the insulation application to conducting wire (such as magnet-wire), With high temperature resistant (such as the thermal shock of up to 180 DEG C (for example, about 180 DEG C)) ability, there is relatively high flexible, good machine Tool characteristic and economy.
As described above, adhesive includes for making adhesive resin part (for example, the comprising epoxy resin 1a, 2 and 3 One embodiment adhesive resin part, or the second embodiment adhesive resin part comprising epoxy resin 1b, 2 and 3) Cured adhesive curing part.Adhesive curing part includes curing agent.In an exemplary embodiment, curing agent packet Containing dicyandiamide.In particular, it was found that dicyandiamide is for keeping film coating composition cured special for example on conducting wire etc. Effective curing agent efficiently reduces or eliminates dent and/or pit in cured film.
Other curing agent can be applied in combination with dicyandiamide or there is no dicyandiamides.Some example packets of other curing agent Include pyromellitic acid anhydride；Tetrabydrophthalic anhydride；Benzophenone tetracarboxylic dianhydride；Trimellitic acid；Some standard anhydrides are solid Agent；Aromatic amine and/or aliphatic amine, such as ethylenediamine, diethylenetriamines, trien, dimethylamine propylamine, benzyl two Methylamine and methylene dianiline (MDA)；Etc..
In addition to curing agent, adhesive curing part may include the promotor of the curing time for reducing composition. In an exemplary embodiment, adhesive curing part includes 2-methylimidazole.Promotor (2-methylimidazole and dicyandiamide Mixture) commercially available example include by Hexion manufacture trade name EpikureTM P108/EpicureTMP104, by The trade name Dyhard of Evonic manufactureTM 100S/DyhardTMMI and the commodity manufactured by Dow Chemical Company Name D.E.H.TM40.The promotor (mixture of dicyandiamide and imidazoles) that can be used in the various embodiments of present disclosure It is complete description can be found in U.S. Patent No. 3,631,150, be incorporated herein by reference.Can be used other Promotor includes two hydrazides, nitryl hydrazine, stannous octoate, epoxy-Novolak resin and/or analog.
In an exemplary embodiment, adhesive curing part is present in adhesive with a certain concentration, so that phase For adhesive curing part, there are the epoxies of stoichiometric excess.That is, the epoxy of epoxy resin is worked as in adhesive resin part Weight (for example, effective active site) excessive or curing agent equivalent weight greater than adhesive curing part is measured (for example, effectively Active site).In an example, relative to curing agent part, adhesive with about 10% stoichiometric excess (for example, about 1.1 epoxy and the stoichiometric ratio of curing agent) epoxy.In an exemplary embodiment, adhesive curing part with The ratio of about 2:1 includes curing agent and promotor.In another exemplary embodiment, binding agent based total weight, bonding Agent cured portion exists in adhesive with the amount of about 3 weight % to about 7 weight % (for example, about 5 weight %).
In addition to adhesive, composition can also include other additives.For example, composition may include one or more Kind flow control agent, pigment and/or dyestuff, performance enhancers, processing agent or additive, and/or analog.It is exemplary at one In embodiment, composition include flow control agent with help to generate for example with it is more smooth, more glossy appearance more evenly Coating.In an example, flow control agent is acrylate copolymer (such as polyacrylate etc.).Commercially available flowing control The example of agent includes the trade name Modaflow manufactured by Monsanto chemical companyTM, by Estron manufacture quotient Name of an article ResiflowTMThe RF6000 and trade name Modarez manufactured by CytexTMMFP.Other suitable flow control agent packets Include thixotropic agent such as fumed silica (such as the trade name Aersosil commercially available from CabotTMOr Cab-O-SilTM), it can With asbestos, the POLARGEL NF etc. for using crushing.In an exemplary embodiment, based on the total weight of composition, combination With about 0.5 weight % to about 1.5 weight %, (amount of for example, about 0.2 weight % to about 1 weight %) includes flow control agent to object.
In an exemplary embodiment, composition includes the poly- second for improving flow behavior and pigment wetting characteristics Vinyl acetate (PVA) additive.The commercially available example of such additive is the obtainable trade name manufactured by Kuraray MowitalTM.In an exemplary embodiment, based on the total weight of composition, composition is with about 0 weight % to about 5 weights The amount for measuring % includes PVA additive.
In an exemplary embodiment, composition includes one or more of pigment, such as opaque for providing The titanium dioxide pigment of property and/or colored pigment such as yellow uitramarine (such as iron oxide pigments, nickel face for providing color Material, antimony rutile pigment etc.).The example of commercially available pigment includes trade name Hitox to titanium dioxide pigmentTM, or to coloured Pigment includes trade name YLOTM-1888D、MAPICOTM Yellow 1050A、BayferroxTM 930、YellowTM10C112、 Tipaque YellowTMTY-70.In an exemplary embodiment, based on the total weight of composition, composition is with about 0 weight The amount for measuring % to about 5 weight % includes titanium dioxide pigment, and/or the total weight based on composition, with about 0 weight % to about 5 The amount of weight % includes colored pigment.
In an exemplary embodiment, composition includes performance enhancers (such as ceramic bead etc.) as to dielectric electricity The reinforcing agent of resistance.The commercially available example of such performance enhancers is obtainable by Zeeospheres Ceramics or 3M system The trade name Zeeospheres Ceramic Microspheres madeTMG-200.In an exemplary embodiment, it is based on The total weight of composition, composition include performance enhancers with the amount of about 0 weight % to about 5 weight %.
In an exemplary embodiment, composition is mainly by adhesive and small concentration additive (such as aforementioned paragraphs Those of middle discussion additive) it forms together.In an exemplary embodiment, based on the total weight of composition, composition With about 70 weight % to about 100 weight % (for example, about 80 weight % to about 100 weight %, for example, about 90 weight % to 99 weights Measure %) amount include adhesive.In an exemplary embodiment, additive constitutes the remainder of composition, wherein gluing Mixture is less.
In an exemplary embodiment, powdery paints is prepared using composition as described above.Implement at one It is composition is equably dry-mixed and be supplied to such as extruder in scheme.Advantageously, extruder helps to obtain the painting of highly flexible Material, although twin-roll mill and other kinds of mixer can be used.In an exemplary embodiment, it is known as using one kind The extruder of kneader.Kneader is worked in a manner of identical with conventional extruders, but is also applied to extruder screw or screw rod Add reciprocal axial motion.In an exemplary embodiment, the extrusion of composition for example exists just above the fusing point of composition It is carried out at about 40 DEG C to about 100 DEG C.After several heating zones are common, such as extruder can have about 40 DEG C to about 60 DEG C Area and about 90 DEG C to about 100 DEG C of mould.In an exemplary embodiment, the residence time in extruder be about 2 minutes extremely About 3 minutes, if extruder is kneader, the residence time was about 60 seconds to about 90 seconds.
After extrusion, composition is cooling to form solid, and grind for example in micro mill to produce size It is about 0.25 inch to about 0.5 inch of piece.These pieces are for example ground in pulverizer, then by sieve to obtain powder End.Fine powder is used to prepare thin coat, but if powder is too thin, it will not be fluidized well and there may be problems.One In a exemplary implementation scheme, particle size is at least about 400 mesh (i.e. about 37 μm) and compares about 100 mesh (i.e. about 149 μm) more Carefully.Having discovered that by falls into the essentially all particle in powdery paints in the range of about 100 mesh to about 400 mesh, powder Coating can be efficiently used for electrostatic fluidized bed.In an example, the particle in powdery paints is in about 200 mesh (74 μm) to about In the range of 400 mesh (37 μm).
In an exemplary embodiment, it provides and is made for being coated with the powdery paints as discussed in aforementioned paragraphs The method of product.Powdery paints is applied to product (such as conducting wire etc.) to form the product through powder coating.Particularly, can make Powder is applied to product with fluidized bed or other application devices.It has been found that static gun or electrostatic fluidized bed are thin uniform to producing Film (such as thickness is less than about 2 mils) is effective.Conducting wire to be coated or product are grounded, and by being contacted with electrification air Powdery paints is charged, powdery paints is adhered on conducting wire or product and forms dry powder layer on product surface.Then will Product through powder coating is exposed to heat so that powdery paints fusing and solidification.In some cases, be related to quenching Step so that The temperature of coated product quickly reduces.Then protective layer or film are formed.
In an exemplary embodiment, it is carried out about in the baking oven for being solidificated in about 125 DEG C to about 250 DEG C of powdery paints 1 minute to about 25 minutes.Curing time depends on temperature.The comparison coating higher temperature of large surface can be used to conducting wire coating Degree.Curing time usually can for example be reduced by using other infrared heating or induction heating, this is in coated wire It is middle possible particularly useful.In an exemplary embodiment, according to the size of charge and its dependent variable, about 1 mil is generated extremely The conducting wire coating of 16 mils.
Following table presented below, especially table 1A and table 1B are according to exemplary implementation scheme for each of powdery paints The embodiment of kind composition.It provides embodiment to be only used for illustrating purpose, and is not intended to limit combination in any way Various embodiments.
Embodiment-is used for the composition of powdery paints
Table 1A
Table 1B
Although having been presented at least one exemplary implementation scheme in the foregoing detailed description of present disclosure, answer Understand that there are a large amount of modifications.It should also be understood that exemplary implementation scheme is only example, and it is not intended to be limiting in any manner Scope of the present disclosure, applicability or configurations.On the contrary, foregoing detailed description will be provided for those skilled in the art for realizing The regular course figure of the exemplary implementation scheme of present disclosure.It should be understood that not departing from as explained in the appended claims State scope of the present disclosure in the case where, the function and arrangement of element described in exemplary implementation scheme can be carried out Various changes.

Claims (20)

1. a kind of composition for powdery paints, the composition includes:
Adhesive, described adhesive include adhesive resin part and adhesive curing part, wherein described adhesive resin portion Subpackage contains:
Epoxide equivalent weight is first epoxy resin of the about 500g/ equivalent to about 560g/ equivalent；
Epoxide equivalent weight is second epoxy resin of the about 1600g/ equivalent to about 1950g/ equivalent；And
Epoxide equivalent weight is third epoxy resin of the about 850g/ equivalent to about 1050g/ equivalent.
2. composition according to claim 1, wherein first epoxy resin is the epoxidation modified through novolaks Object group content is epoxy resin of the about 1790mmol/kg to about 2000mmol/kg.
3. composition according to claim 1, wherein the softening point T (g) of first epoxy resin is about 90 DEG C to about 98℃。
4. composition according to claim 1, wherein second epoxy resin, which is epichlorohydrin, reacts production with bisphenol-A Object.
5. composition according to claim 1, wherein the softening point T (g) of second epoxy resin is about 126 DEG C to about 137℃。
6. composition according to claim 1, wherein the third epoxy resin is butadiene-nitrile through carboxy blocking (CTBN) modified epoxy resin, the modified epoxy resin of the butadiene-nitrile (CTBN) through carboxy blocking is bisphenol-A epoxy Butadiene-nitrile rubber adduct of resin and carboxy blocking.
7. composition according to claim 1, wherein the softening point T (g) of the third epoxy resin is about 65 DEG C to about 85℃。
8. composition according to claim 1, wherein described adhesive resin portion is by first epoxy resin, described Second epoxy resin and third epoxy resin composition.
9. composition according to claim 1, wherein the total weight based on described adhesive resin portion, described adhesive Resin portion includes with first epoxy resin existing for the first amount of about 20 weight % to about 30 weight %, with about 65 weights Measure second epoxy resin existing for the second amount of % to about 75 weight % and with about 1 weight % to the third of about 9 weight % Measure the existing third epoxy resin.
10. composition according to claim 1, wherein first epoxy resin, second epoxy resin and described The ratio of third epoxy resin is about 1:2:0.1 to about 1:3:0.3.
11. composition according to claim 1, wherein described adhesive cured portion includes curing agent, the curing agent It is solid including dicyandiamide, pyromellitic acid anhydride, tetrabydrophthalic anhydride, benzophenone tetracarboxylic dianhydride, trimellitic acid, acid anhydrides Agent, aromatic amine, aliphatic amine, ethylenediamine, diethylenetriamines, trien, dimethylamine propylamine, benzyl dimethylamine, Asia Methyldiphenylamine, or combinations thereof.
12. composition according to claim 11, wherein the curing agent includes dicyandiamide.
13. composition according to claim 11, wherein adhesive curing part also includes promotor.
14. composition according to claim 13, wherein the promotor includes 2-methylimidazole.
15. composition according to claim 11, wherein the total weight based on described adhesive, described adhesive solidified portion Divide and is present in described adhesive with the amount of about 3 weight % to about 7 weight %.
16. composition according to claim 1, also comprising one or more of flow control agents, pigment and/or dyestuff, Performance enhancers, processing agent, additive, or combinations thereof.
17. composition according to claim 16, wherein the total weight based on the composition, adhesive is with about 70 weights The amount for measuring % to about 100 weight % exists.
18. a kind of powdery paints is made up of following:
Composition is dry-mixed, and the composition includes:
Adhesive, described adhesive include adhesive resin part and adhesive curing part, wherein described adhesive resin portion Subpackage contains:
Epoxide equivalent weight is first epoxy resin of the about 500g/ equivalent to about 560g/ equivalent；
Epoxide equivalent weight is second epoxy resin of the about 1600g/ equivalent to about 1950g/ equivalent；And
Epoxide equivalent weight is third epoxy resin of the about 850g/ equivalent to about 1050g/ equivalent；
Squeeze out the composition；
The composition is cooling to form solid；And
By the composition grind into powder.
19. a kind of method for coating product, the described method comprises the following steps:
Powdery paints is applied to the product to form the product through powder coating, wherein the powdery paints passes through following system At:
Composition is dry-mixed, and the composition includes:
Adhesive, described adhesive include adhesive resin part and adhesive curing part, wherein described adhesive resin portion Subpackage contains:
Epoxide equivalent weight is first epoxy resin of the about 500g/ equivalent to about 560g/ equivalent；
Epoxide equivalent weight is second epoxy resin of the about 1600g/ equivalent to about 1950g/ equivalent；And
Epoxide equivalent weight is third epoxy resin of the about 850g/ equivalent to about 1050g/ equivalent；
Squeeze out the composition；
The composition is cooling to form solid；And
By the composition grind into powder；And
The product through powder coating is exposed to heat.
20. according to the method for claim 19, wherein the product through powder coating is exposed to hot described including making Powder coating solidification is to form the thermal shock resistance up at least about product of 180 DEG C of cured powder coating.
CN201810811554.8A 2017-07-24 2018-07-23 Powdery paints and combinations thereof and method for coating product Pending CN109294385A (en)

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